Shade determination based on digital photographs and different sources of illumination. An in-vivo, pilot study

Q1 Medicine

Journal of oral biology and craniofacial research Pub Date : 2025-09-23 DOI:10.1016/j.jobcr.2025.09.020

Srishty Pundir, Siddharth Swarup, V.N.V. Madhav

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引用次数: 0

Abstract

Aim

The aim of the study was to compare shade estimation in maxillary anterior teeth under different ambient light sources, whilst using digital photography.

Materials and methods

In this study different ambient light conditions were considered for shade determination. 96 readings were obtained from six maxillary anterior teeth were selected for this study, and shade was determined at the middle 1/3rd of the tooth using a digital spectrophotometer and the L∗a∗b∗values obtained, which was the control. Photographs were taken as per the different light sources. The photographs were then subjected to a Classic Color Meter software to derive the L∗a∗b∗ values. The L∗a∗b∗ values obtained were statistically analysed and results obtained.

Results

The results depicted that cool white light as compared to the digital spectrophotometer showed better results with statistically insignificant difference in the L∗ category (p = 0.598) & b category (p = 0.143). Warm white light was also comparable only in the L∗ category (p = 0.903). Natural sunlight showed similar results when compared in the L∗ category (p = 0.939), but varied significantly in a∗ and b∗ categories. While LED Ceiling light showed the most significantly different results under all categories of L∗, a∗ and, b∗.

Conclusion

It was concluded that digital photography method of shade estimation can be a reliable method of shade estimation under cool white light illuminance. Warm white light and natural sunlight are dependable measures for value matching, whereas LED ceiling lights yielded inaccurate shades through the digital photography method of shade estimation in all axes of the CIELAB space.

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基于数码照片和不同光源的阴影测定。一项体内试验研究

目的利用数码摄影技术，比较不同环境光源下上颌前牙的阴影估计。材料和方法在本研究中考虑了不同的环境光条件来确定阴影。本研究选取6颗上颌前牙的96个读数，用数字分光光度计测定牙齿中间1/3处的色度，得到L∗a∗b∗值，作为对照。照片是根据不同的光源拍摄的。然后将照片置于经典色计软件中以推导出L * a * b *值。对所得的L∗a∗b∗值进行统计分析并得出结果。结果冷白光与数字分光光度计相比，在L *类（p = 0.598）和b类（p = 0.143）中显示出更好的结果，差异无统计学意义。温白光也仅在L *类别中具有可比性（p = 0.903）。自然光照在L *类别中表现出相似的结果（p = 0.939），但在a *和b *类别中变化显著。而LED吸顶灯在L∗、a∗和b∗的所有类别下的结果差异最显著。结论在冷白光条件下，数字摄影的阴影估计方法是一种可靠的阴影估计方法。暖白光和自然光是价值匹配的可靠措施，而LED吸顶灯通过数字摄影方法在CIELAB空间的所有轴上进行阴影估计，产生了不准确的阴影。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of oral biology and craniofacial research Medicine-Otorhinolaryngology

CiteScore

4.90

自引率

0.00%

发文量

133

审稿时长

167 days

期刊介绍： Journal of Oral Biology and Craniofacial Research (JOBCR)is the official journal of the Craniofacial Research Foundation (CRF). The journal aims to provide a common platform for both clinical and translational research and to promote interdisciplinary sciences in craniofacial region. JOBCR publishes content that includes diseases, injuries and defects in the head, neck, face, jaws and the hard and soft tissues of the mouth and jaws and face region; diagnosis and medical management of diseases specific to the orofacial tissues and of oral manifestations of systemic diseases; studies on identifying populations at risk of oral disease or in need of specific care, and comparing regional, environmental, social, and access similarities and differences in dental care between populations; diseases of the mouth and related structures like salivary glands, temporomandibular joints, facial muscles and perioral skin; biomedical engineering, tissue engineering and stem cells. The journal publishes reviews, commentaries, peer-reviewed original research articles, short communication, and case reports.